Experimental study of heat transfer enhancement in automobile radiator using Al2O3/water–ethylene glycol nanofluid coolants

Nambeesan, K.P. Vasudevan; Parthiban, R.; Kumar, K. R. Sunil; Athul, U.R.; Vivek, M.; Thirumalini, S.

doi:10.15282/ijame.12.2015.5.0240

Cited by 21 publications

(11 citation statements)

References 26 publications

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“…This term was used in 1974 by a Japanese scientist, Norio Taniguchi [1]. A nanofluid is generally understood to mean a suspension of nano-sized particles having diameter of about 1 nm to 100 nm in a conventional base fluid [2][3][4]. The beauty of nanofluid is that it can improve or enhance thermo-physical properties such as thermal conductivity, thermal diffusivity, viscosity and convective heat transfer coefficient [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…For example, CNTs have high aspect ratio, ultralight weight, high mechanical strength, high electrical conductivity, high thermal conductivity and high surface area as compared to other types of metallic or oxide nanoparticles [12][13][14]. Literature on thermal conductivity has highlighted that the addition of nanoparticles, such as Al2Cu and Ag2Al, at concentrations of 0.2 vol% to 1.5 vol% to ethylene glycol and deionised water has resulted in an enhancement of about 50% to 150% higher than that of standard base fluid, whereas enhancement of 12.7% at 1.0 vol% of CNT was reported for ethylene glycol-based nanofluids [2,9,[15][16][17][18]. Studies conducted by researchers have found that the inclusion of a surfactant in nanofluids influences effective thermal conductivity, where enhancement was about 22.2% at 0.5 wt% of CNT and 0.01 wt% of PVP [19].…”

Section: Introductionmentioning

confidence: 99%

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Thermal conductivity and viscosity of deionised water and ethylene glycol-based nanofluids

Abdullah¹,

Mohamad²,

Hashim³

et al. 2016

J. MECH. ENG. SCI.

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This paper focused on thermal conductivity and viscosity of deionised water and ethylene glycol-based nanofluids at three different temperatures (6C, 25C and 40C). For the preparation of nanofluids, a two-step method, comprised of homogenisation and sonication, was used on a mixture of MWCNT-OH, PVP and the base fluid. The results revealed that thermal conductivity was enhanced by about 8.86% for 0.8 wt% deionised water-based MWCNT-OH nanofluid, and by 5.37% for 0.2 wt% ethylene glycol-based MWCNT-OH nanofluid. Meanwhile, in viscosity test, the highest temperature of 40C exhibited lowest viscosity. This phenomenon happened only with ethylene glycol-based nanofluid, whilst the data on the viscosity of deionised water-based nanofluid was inconsistent at certain nanofluid concentrations . In conclusion, addition of MWCNT-OH into base fluid enhanced base fluid performance , giving it the potential to be used in cooling system applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermal conductivity and viscosity of deionised water and ethylene glycol-based nanofluids

Abdullah¹,

Mohamad²,

Hashim³

et al. 2016

J. MECH. ENG. SCI.

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“…There was no significant effect on pressure drop from volume fraction of 0.8 and 1.6 as stated by Akyurek et al [31]. Heat transfer enhancement by different fluid domains and nanofluid implementation was also [32][33][34][35][36].…”

Section: Introductionmentioning

confidence: 68%

Investigation of thermal and hydrodynamic behaviour of Al2O3-water nanofluid through a rough parallel plate

Ehsan¹,

Salehin²,

Islam³

2017

Int. J. Automot. Mech. Eng.

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The implementation of nanofluid within a preferred volume fraction in base fluid is one of the innovative and inexpensive methods of enhancing the thermal and hydrodynamic behaviour in terms of increased heat transfer rate and reduced pumping power. In the present paper, forced convection heat transfer and pumping power were studied for a rough parallel plate subjected to constant heat flux under turbulent flow condition. The investigation was performed for a wide range of Reynolds number 10,000 to 30,000 with Al2O3 nanoparticles volume fraction 1% to 5% dispersed in base fluid water and three different rough surfaces (relative roughness: 0.001, 0.002, and 0.003) were considered. Heat transfer performance was substantially improved more by employing roughness at the wall of the boundary than the smooth parallel plate and also for the increased more volume fraction of nanofluid than base fluid water. Augmentation was found significant at higher surface roughness and volume fraction by the virtue of superior thermo-physical properties of nanofluid up to 36.9% and 26.1% for the rough surface. Roughness did not increase the pumping power as its effect was mitigated by the nanofluid. 2% volume fraction of Al2O3-water nanofluid on 0.003 relative roughness that showed the superior behaviour for heat transfer enhancement with minimum pumping power requirement.

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“…The enhanced thermal conductivity of nanofluids has been a subject of intensive research for the past few decades [9,[13][14][15][16][17][18]. There are two different methods of applying nanofluids in a refrigerating system, namely nanorefrigerants and nanolubricants [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Performance of a domestic refrigerator using nanoparticles-based polyolester oil lubricant

Haque¹,

Bakar²,

Kadirgama³

et al. 2016

J. Mech, Eng, Sci.

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The performance of a domestic refrigerator with the addition of nanoparticles in the lubricant was experimentally investigated. Different sizes of nanoparticles of Al2O3 and TiO2 were added to the polyolester (POE) oil in two different volume concentrations (0.05 and 0.1 vol.%). Energy consumption tests and freeze capacity tests were then performed on the refrigerator. The investigation results showed that the refrigerator worked normally and safely with the nanolubricants. The results of the experiments indicated that the refrigerator performed better with nanolubricants as compared to pure POE oil. The COP of the systems was increased by 19% and 22% when 0.05% and 0.1% Al2O3 nanoparticles were added to the POE oil respectively. The system with 0.1% volume concentration of Al2O3 and TiO2 nanoparticles added to the POE oil consumed 27.73% and 14.19% less energy as compared to the pure POE oil system. Hence, this study showed that the addition of nanoparticles in the lubricant oil of the refrigerator is practical and it enhanced the performance of the refrigerator

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Experimental study of heat transfer enhancement in automobile radiator using Al2O3/water–ethylene glycol nanofluid coolants

Cited by 21 publications

References 26 publications

Thermal conductivity and viscosity of deionised water and ethylene glycol-based nanofluids

Thermal conductivity and viscosity of deionised water and ethylene glycol-based nanofluids

Investigation of thermal and hydrodynamic behaviour of Al2O3-water nanofluid through a rough parallel plate

Performance of a domestic refrigerator using nanoparticles-based polyolester oil lubricant

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